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Triploid salmon egg technology could prevent cross breeding

July 18, 2019  By Hatchery International Staff

Scientists at the Norwegian Institute for Nature Research (NINA) recently revealed

Scientists at the Norwegian Institute for Nature Research (NINA) recently revealed that triploid salmon may play a significant role in the sustainable development of the aquaculture industry.

In a new study titled, “Comparisons of reproductive function and fatty acid fillet quality between triploid and diploid farm Atlantic salmon (Salmo salar),” researchers demonstrated that triploid salmon do not pose a significant threat to the wild salmon population, have good growth performance and high fillet quality. Triploidy could prevent escaped farm salmon breeding in the wild, while also improving nutrient quality within farmed fillets.

Through many years of R&D, Atlantic salmon ova producer StofnFiskur has developed a secure method for triploidization of salmon ova. In the same way as in humans, the genes in salmon are normally placed on two sets of chromosomes. StofnFiskur can produce triploid ova by exposing fertilized eggs to high pressure in combination with specific temperature levels, at the correct time early in the production process. Then, the fertilized ova get three pairs of chromosomes instead of the natural two, producing salmon that are unable to reproduce. Through strict testing procedures at its land-based production facilities, StofnFiskur ensures that salmon ova sold as triploid are sterile.



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